Locomotive boiler and method of operating the same



May 28, 1929d o. H. HARTMANN ET Ax. 1,714,505,

LOCVOMOTIVE BOILER AND METHOD OF OPERATING THE SAME Filed May 9, 1925 2. sheets-sheet WITH-ESS May 28, l929- o; H. HARTMANN ET Al. 1,714,505

LOCOMOTIVE BOILER AND METHOD OF OPERATING THE SAME.4

Filed May 9,. 1925 2 Sheets-Shee /N VEN Tai/eg A TTU/(NE YS Patentetl May 28, 1929;

UNiTeo STATES PEN, QFFICE. y

TTG H. IEl'RTMANN, DE;CASSEIi-WILHELMSHGHE, AND 'W'XFLHELM JUNG, 0F CASSEL; GERMANY, ASSIGNORS T SCHMIFJTSCHE HEISSXAMPF GESELLHAFT M. IB. H., A GERMAN CORGRATIN, Gf JASESELTILHELMSEGHIE, KERMANY;

Application filed Mey 9, 192?, Serial No. 29,640, en@ in Germany laay i4, 1922s.

@or invention relates to locomotive boiL ers in which provision is nizicle 'for generating live steam et e Apluinlity of different ressures in the respective sections ot the oler. Our ir'nprovemen'ts lieve been de A signed loiimf-irily for use in eonjunction with a. locomotive in which live. steam of two pressures is employed, the high-pressure section embodying e 'water-tube ireeloox, While the low-pressure section `eonsists of e emol-:e flue longitudinal boiler et' the customary type. ln" our present invention, tlieifeed Water is delivered to the liigli-pressiiie seetion, anti the letter the excess. feed wowv ter is conveyed to the low-pressure section 'or sections, thutis to say, to the longitutliu nallsoiler, tlie particular cose mentioned above This arrangement effects a greet ing only at long intervals.

simpliiicetion in 'the supply yof 'the leed wn.- ter, since s, single feed pump willjsufice supplying Weterrto all pressure stages or sections oi? the steam generator plant, and

this feed pump may also have the funetion of causing tlie water to vllovv throng-li the feed Water heaters. We thus evoicl the com-l plicated operation which would be inevitable if two or more seperate feeding devices were employedrt'or the different pressure stages.

The water-tube' fire-box, constituting e higli-pressure steam generator, will thus elways receive fresh feed Water, sind 'not water taken rom the low-pressure longitudinal boiler and contaminated by boiler-seele. Since it receives relatively pure Water,l 'the lire-box looiler section, which contains o comparatively small amount of Water, 'will not boil over, is likely to occur when this boiler is supplied with impure unter.

The new arrangement is particularly uilvanteigeous when the feed Weiter is highly heated, for instunee to'lil' centigrede and more, lnel'ore its admission to tlie lire box. This procedure will insure elimination of the substances 'producing boileuscele, before tlie feed wetter reaches the ireliox, 'und will prevent or retard the fouling oi the steoiuprodueing, heating surface of the lire box, so that this surface will require cleoiilrelereloly the feed Water is first heated to about "i000 c grade by the exhaust of the engine enti.

passed. through another lieeter 'in which liveA gravity, that is to soy, without the 4use ot e )um or other )rooellino' device.

oev

llrelieoting the leecl 'Water to e high'tempereture insures the seme'edventage aswhen.

water from low-} ressure boiler is fed directly to 'the liigli pressure boiler. That is to soy, 'by for the greater portion ofthe liest eonve'yeiil to the Water in the lire box will be utilized, not to bring suoli weten' to e luv'lier tem iereture. but to convert it to e l l steam. 'llie proportion o1 stoom produeci 1u the high pressure boiler (relatively to the total amount of steam generated) Will thus be increased.

boiler is preferably controlled eutomatioal--v ly, lor the salte of simplicit for instance, by .ineens of ulioet.

'llie overilovv of the eeel Witter 'from the high pressure :section to the low pressure In that event, notwithstanding the use of e plurality of pressures,

the firemen will 'tieve to watch only one Waiter gouge and ottend to e, single pump. Since @needless consumption of power is involved in the overflow ol. the eeclwater to the longitudinal boiler, when two boiler pressures are employed, it is desirable to drive the toed waiter pump es economically l.es possible. For this purpose, the feedI We.` terpunip is operated by'liigli .pressure steam, and while the engine is under Way tlie exlioust stoom from tl'ie feed Water vpump is mixed with the steen?. in the receiver; when the engine standing still, such exhaust steam is led into tlie low-pressure boiler. In this latter event, it is advisable to interpose un eil separator in tlie exhaust piping oit the auxiliary which drives the feed Water pump. Instead ol using high pressure steam for the operation oi the feed Water pump, 2night talee steam or thisfpurpose from the low pressure loiler and use the exhaust et the euxilieryflrving the feed weiter plus?, for lig. tney-i eri, water in 45 of 1he boiler tained in such exhaust and wellicnown or approved infirmer. With this mode of operzizion, die enire euesgy o the high pressure will loe used for driving he engine.

5 le. is preferable, furthermore, in order that superhent muy lie available ai. ull times for the opere'bion oiie so provide u, seperate superlieeter or heater section 'lor this purpose. lend of conducting die eefglvwuaer, :if-Lei ilims ubsra 'ted heet from the exhaust steam oit'-tl1e eng ne, through e. seperate device consuilnuou ing'usecond feed Writer neuter, io eiecl; o.

further increase in the temperature or" the feed Waiter, We might lead lxhe feed preheated li); the-final exhaust, through a system of coils or pipes arranged in the longit/udinel boiler.

A sntisfuelory form o? our invention is shown, as en exemple, in the accompanying i drawings, in Whichliigs. .l end represent,l in side eleifation9 e loeoniotive embodying 'our invention .inn forni in which live seein of two dilierent pressures is generultecl.

At l we here shown lie lire een, the Wells of which eonsisizs of iones, und. et il hev lonfgitudinel boiler. Wl on iney be of any Well lmonn or apuros/eo eype. The fire bor; Walls consiifuie of elle sluier spese l31) of n high-pressure boiler or boiler seciyion9 which Walzer spuce is sepurw'e from the Weiter sopee of zlie lower ure ooiier or coller section f. The @tubes oi elle nre box ure uilized for gen on, ce? steam 35 in u container 3, eilieii by being sonni/cited directly with lle wete?? space of seid con feiner, or by indireei; heating., the hor. Weser from the fire hun cubes eiruuluing through coils locezed in ibiief'weter s ofice oi ine con- 40 miner 3, the interior of seid coils having no communication Wish the inierier oli the conI feiner. The lowpressnre boiler 2 lies e steam dome 5.

The steam spuces of the container Il und section 2 ere not in direcn4 con municulion with each einer, so thee it becomes possible io produce in die centaine? 3, live steam of u almospheres) considerably higher than liei'. (forl inslunce, .fifteen memos-pome@ 'generated in llie lougiiildinui smoke iiue boiler The feed. Water is delivered by u pump o to the conninor 3 along lic puch indicated below. 'llic auxiliary engine ll'whieh operv etes 'the' feed pump (3 is driven by nigh pressure steuni ulen from elio eontoiuer through si pipe under wey,

, 11 passes through u pipe 13 to ine receiver 14h of the mein engines. When Aelle.locoilmtive is stendin still, this exlieust'meyf'lne `cimduciged to t has been mentioned alcove. tllisfcese, .since it is undesirable to ellow the oil con- Sieem to reach the 3 lfliiile lLie locomotive is eed Waiter pump..

wete?? pressure (for insieme, sixty'.

. looiier 2, bui.

ille esonusli from ille auxiliary e low-pressure boiler 2,

miennes inw pressure boiler, We prefer lo inierpose oil-sc pernors 13 of any Well-knowii or ope; proved type in "die pipe yconnection l3-ioiu the auxiliary 1l to the low )ressurc boiler Z The pump 6 trikes the feed Walzer from ille 'tender (not shown) through u suction pipe i5 und forces it through a pipe lo into u surface lleeer i7, heated bythe exliuust of ille mein, engines, which is supplied through e, pipe 18. lifuter resulting from condeuse 'cion of this exhaust stoom is discharged through o. pipe 19. in lie lie-eier l?, lie 'feed Waiter is heated .to about l0!)o ccntigrade, und then passes through u. pipe 2G, Controlled by e check vulve 30,' to e suriuce hesiter 2l, the heating medium for which consists of (low-pressure) live steam teken from the longitudinal boiler 2 through o. pipe The heater 2l is .placed ei: o. rele--y tively high level, so that the Water resulting from the Condensation of the steeui which beets .the feed water et 2l, .muy pass to the low pressure longitudinal boiler 2 through e. pipe 23 by grsviy, time is to soy, .vi'liou;

the provision of sidditionel propelling de d might 'causo it oicw 'from lle pipe 52() through o brunch conduit 20, controlled by u vali/e 3l, iuio system o :pipes -ofe 2Q arranged wiilxiu elle loW-pressure longi tudinol boiler, preferably in the seum space thereof or, obviously, we miglii; he water through bolli lieaiers in parsiiel shown in the drawing. By operoingtlie velves controlling the flow from the pipe 210v inlzo heaters S50 and 2l. the water be mede to pass into either or both of seid nemers :is desired. Uf coul-se, when only lleeter 2G fis used, *che 'flow of seani from dome o to'laeeter 2l will be stopped es by' ineens of e vulve 35. lin the heater 2l or 20"., elle temperature of the feed Water is raised materially above the temperature (1G00 ecntigrede) to which, it Ems been lieeed in the healer 17.- roni the heater 2l or 20"' or 'both of them e pipe 24E controlled by e. vulve 32 delivers .the feed water to the steam space of the eoniuiner 3. The feed waer in coils posses liiougli u. conduit which opens inotiie pipe and controlled by o. vulve The excess l'ecd water passes from the eoniuiner 3 io the low pressure inasmuch as dfereut pressures prei/oil in. the info boiler sections. the communication but temporary, e fleet 25 or equivalent device eontroliing he orei'llonf'i lll@ lli

lli

sure boiler 2 through o, pipe l', it is else f sure boiler section'iviiicliiricludes a water tube .tire-inox, a low pressure section formed by e, iongitudinal smoke flue boiler, said sections being' normally out of communication so to enable diliferent steam pressures to ire maintained therein i'or supplying live n steem et different pressures, :i conduit for supp xying; feed water to the liigl'i pressure boiler section in excess of t1lienorru:il de 'irland of suoli sect-ion., and normally sealed connection 'for I"deliveririg" 'the excess feed wete-r from the high-pressure section to the lovprossiire tion.

i loco'rootive boiler having luge. pressore tribe fire-box, low pressure section 'formed by e longitudinal smoke flue boiler, seid sections being normally ont of communication so to enable different steam pressures to loe maintained therein, :i conduit `for supplying' feed Water to the high pressurev boiler section, and e. 'floot-controlled, normally closed overiow devi e for the passage oi" water from thel higlilpressuresection to the low-pressure section., said device'constructed and arranged. to insure e steam space in seid liigl'i pressure section.

3, A locomotive boiler having e liigii pres sure section, s low-pressure section for su@ plying live steam et different pressures, o conduit for supplying feed water to `said liigii pressure .section in excess of the nor" mel demand of such section., and a. normally sealed. connection for delivering the excess feed waiter from tlie high-pressure section to tlie low-pressure section.

4. A locomotive boiler having a high pressure section, e low-pressure section, conduits connected to said boiler sections to withdraw live steam of different pressures therefrom, n conduit for supplying :tecd water to said high pressure section in excess of the normal denizind'o such sectiont and u Hoet-controlled, normally closed overflow device acting in response to 'the variations 1n Water level irl the high pressure boiler for control-y linv the passage of excess Water from the hig pressure section to the low-pressure section.

5. Themetliod of supplying feed Water to boiler Sections' in which live steam of differ-v ooiler section which includes a water ent pressures is produced, wiiioli consists in supplying tlie iced 'wete-r to e liiglifpressure Section in excess of tlienormsl demand oisucli section and then oonveyingtlic excess i' feed water from suoli high-pressure section to e low-pressure sectionv 6. The method of supplying feed Water to boiler sections in which live steam oil ditler1 ent pressures is produced, which consists in supplying' the' ieed Water to s, liiglrpressurc section in excess of tlienormel demand of suoli section and keeping suoli section. out' of eonirnuncmtion with the low-pressure section Wliile the' water is below s certain level in Vsaid liigli-pressine section7 and conveying;

excess feed Water from the high-pressure secvtion to the low-pressure section i-vhenevor' the feed Water by live steam teilten from the low-pressure section, sind thereupon passing the feed Water tiros heated to the high-pres sure boilersection.

8. A locomotive boiler leaving o high-pres sure section end o, low-pressure section, end

e feed water heater leaving connection to heet it live steam teiten from vthe iowpressure boiler section, seid lieeter being located o level above tire seid low-pressure section, and 'having en outlet connection through which the Water resulting :troni the condensation of the heating steam iney tlow to seid. low-pressure. section by gravity.

9.1i locomotive boiler lieving e higlr pressure section end e loiv'pressure section, e feed Waiter lieter leaving connectimie for heatingr it with the exhaust steam of tlie locomotive engine, sind. si second, feed wafer heater, interposed in tlie pelli of tiie Water from said. first hesiter to the discharge of suoli Water into the boiler, end consisting of e tube system ioeated within the loW pressure boiler section.

10. A locomotive boiler having e 'high pressure boiler section which includes 'a water tube irefbex, is, ioW pressure section formed li'y a longitudinal smoke iiue boiler, said sections ybeing normally out of oommunicotion so to enable diierent steam pressures to be meintainedtlierein for supplying live steam at different pressures, o

yconduit for sopplying feed eviter to the high pressure boiler section excess o' tire normal demand of such section, e prelieeter for -sziid feed Water, and a normally. sealed i connection. for delivering the excess feed waiter from the high pressure section to the low pressure section.

L A E @comotve .boier having a high pressure secn, u 10W @fessure sc-ctig'm for supplying ive stamm at' derem pressmfcs,

a wndut sl'lppjfug :fwd mailer `to said 5 high pessuw section in excess @i de' normal demand sach seciicn? a preheatel for saidv 'fwd vmer, and a normally sealed connec'tlon mimo@ 

